HG-1000 concrete penetration resistance meter operation - Database & Sql Blog Articles

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1. Application of HG-1000 concrete penetration resistance meter

The concrete penetration resistance meter uses the penetration resistance method to determine the concrete setting time.

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HG-1000 concrete penetration resistance meter

Operational use

Place the concrete penetration resistance gauge on the horizontal platform. Fill the sample container with the concrete sample to be tested and place it on the instrument chassis. Loosen the adjustment screw and select the appropriate penetration needle.
Rotate the adjustment screw to align the gauge pointer with the scale zero line.
Put the toggle switch 1 in the adjustment position, and place the toggle switch 2 in the forward position. After pressing the work button, the sample container starts to rise after 2 seconds, and can be adjusted after stopping. Loosen the adjusting screw sleeve during adjustment, adjust the penetration needle to just touch the sample surface, and tighten the adjusting screw sleeve to fix the penetration needle. Press the work button again, the sample container continues to rise and begins to move. At this time, the pressure gauge shows the value and gradually increases. After 10 seconds, the sample container rises 25 mm, that is, penetrates to the deepest position, and the pressure The table indicates the penetration resistance, and the reading is made to record. After the sample container stays for 4 seconds, it starts to fall, and after 7 seconds, it returns to the original position. Automatic shutdown, one test is completed.
For the second penetration test, the penetration position must be changed, and the handle is rotated to rotate it by a certain angle. When the bouncing sound of the steel ball is heard, the change of the penetration point position is completed, and the handle is replaced by the original position. The transformation only needs to repeat the above action. The position of the needle is divided into two inner and outer rings, the outer ring point and the inner ring point. If the penetration point has been used, the upper handle 180 of the instrument must be rotated to change the position of the pen to the other ring. At this time, there is also a ball bounce position. .
When the penetration test point is on the outer ring, the change point only needs to push the handle once, such as the penetration point on the inner ring, and it needs to push the handle twice.
During the test, you should always pay attention to whether the pressure gauge pointer is at the zero point at the beginning, if it is not at zero, it should be zero.
The toggle switch can be placed when there is no need to adjust the height of the penetration needle (using the same sample container and continuous testing without changing the penetration needle)

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Automatic location

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So that in the future test, just press

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start up

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Once the button is pressed, the test cycle is automatically performed for 30 seconds. During the test, if the penetration needle and the test piece die, please put the toggle switch 2 in the reverse position, press the work button to raise the penetration needle and disengage from the test piece.
The penetration needle has three specifications of 20mm2, 50mm2, and 100mm2 cross section. 100mm2 is used for the initial setting test, and a 20 mm2 penetration needle is required for the final setting test.
There are two inner and outer scales on the surface of the pressure gauge, and the inner ring is 0-1.6 MPa, indicating the pressure of the oil in the oil chamber, and the pressure gauge is modified and the pointer is used for zero. The outer ring scale indicates the force applied to the needle. The force value is divided by the cross-sectional area of ​​the penetration needle, which is the penetration resistance (indicated by two thick red lines on the outer scale of the surface): the 350N scribe line corresponds to the initial penetration resistance (ie 3.5 MPa, at this time with 100 mm2) Into the needle); 560N engraved line corresponds to the final penetration resistance (ie 28MPa, at this time with 20 mm2 penetration needle).
After using for a long time, the zero adjustment screw is screwed to the limit position and the pressure gauge pointer cannot be adjusted to zero point. This is because the oil in the sealed cavity is inevitably leaked and the oil is gradually reduced. At this time, oil must be added. It can be used with ordinary oil, and the viscosity during the winter season is small.
When refueling, first unscrew the refueling screw plug on the top of the zero-setting screw plug, then rotate the zero-setting screw plug to the appropriate position, and add the oil from the screw hole. Pay special attention to not mixing the air, refueling to the orifice, and finally Screw on the screw plug, squeeze excess oil, tighten and dry.
The annual inspection can not remove the pressure gauge, the inspection must be verified by the whole machine, and the user can purchase the inspection tool from our factory.